Inkcazo yeSignali yeDefocus
I-"Defocus" sisignali ebalulekileyo yokubona enokuthi itshintshe indlela yokukhula kwebhola yeliso ekhulayo. Ukuba ukuvuselelwa kwe-defocus kunikwa ngokunxiba iilensi ngexesha lophuhliso lweliso, iliso liya kukhula liye kwindawo yesignali ye-defocus ukuze kufezekiswe i-emmetropia.
Umzekelo, ukuba ilensi egobileyo inxitywa kwiliso elikhulayo ukuze kufakwe i-negative defocus (oko kukuthi, ingqwalasela isemva kwe-retina), ukuze ingqwalasela iwele kwi-retina, i-eyeball iya kukhula ngokukhawuleza, nto leyo eya kukhuthaza uphuhliso lwe-myopia. Ukuba ilensi egobileyo inxityiwe, iliso liya kufumana i-defocus entle, izinga lokukhula kwe-eyeball liya kucotha, kwaye liya kuphuhla liye kwi-hyperopia.
Indima yeZibonakaliso zeDefocus
Kufunyaniswe ukuba imiqondiso ye-defocus ye-peripheral retina idlala indima ebalulekileyo ekulawuleni ukukhula nophuhliso lweliso, ingakumbi xa imiqondiso yokubona ephakathi neyasecaleni ingahambelani, imiqondiso ye-peripheral iya kukhokela. Ngamanye amazwi, imiqondiso ye-peripheral defocus inempembelelo enkulu kulawulo lwe-emmetropization kune-central defocus state!
Abaphandi bakholelwa ukuba xa unxibe iiglasi eziqhelekileyo zokubona okukodwa, ugxininiso oluphambili luboniswa kwi-retina, kodwa ugxininiso olusecaleni luboniswa ngasemva kwe-retina. I-retina engaphandle ifumana isignali ye-hyperopic defocus, ebangela ukuba i-eye axis ikhule kwaye i-myopia ibe nzulu.
Uyilo lweeglasi ze-defocus
Iiglasi ze-multi-point micro-transmission defocus ziyilwe kwaye zenziwe ngokwemigaqo ye-peripheral myopia defocus, ukuze umfanekiso we-peripheral ukwazi ukuwela phambi kwe-retina. Ngeli xesha, ulwazi oludluliselwa kwi-eyeball luya kucothisa ukukhula kwe-eye axis. Izifundo ezahlukeneyo zibonise ukuba isiphumo sayo sokulawula i-myopia sinxulumene kakuhle nexesha lokunxiba, kwaye kuyacetyiswa ukuba uyinxibe ngaphezulu kweeyure ezili-12 ngosuku.
Uphando olwenziwe ngomlinganiselo omkhulu we-optical defocus myopia lubonisa ukuba i-defocus ebonakalayo ekude yemifanekiso ye-retina ikhawulezisa ukukhula kwe-eyeball, nto leyo ekhokelela ekwandeni kwe-eyeball kunye nophuhliso lwe-myopia. Ngokwahlukileyo koko, i-defocus ebonakalayo ekufutshane yemifanekiso ye-retina iyacothisa ukukhula kwe-eyeball. Indawo ephambili ewela phambi kwe-retina ngenxa ye-defocus ebonakalayo ekufutshane inokucothisa ukukhula kwe-eyeball kodwa ayinakufinyeza ubude be-axial.
Kwabakwishumi elivisayo abanobude be-axis yeliso obungadluli kwi-24mm, amanyathelo okuthintela kunye nokulawula adibeneyo e-myopic defocus anokuqinisekisa ubude be-axis yeliso eqhelekileyo xa umntu ekhulile. Nangona kunjalo, kubantu abanobude be-axis yeliso obungaphezulu kwe-24mm, ubude be-axis abunakufinyezwa.
Imisebe yokukhanya ye-micro-lens kwiilensi zeglasi yakha imiqondiso ye-myopic defocus ngaphakathi kweliso, nto leyo ebalulekileyo ekunciphiseni uphuhliso lwe-myopia. Nangona kunjalo, ukubakho kwe-micro-lens kwiilensi akuqinisekisi ukusebenza kakuhle; ii-micro-lens kufuneka ziqale zisebenze ngokufanelekileyo. Ke ngoko, itekhnoloji yokuvelisa nokucubungula ii-micro-lens kwiilensi ikwavavanya ubugcisa kunye netekhnoloji yeenkampani zokuvelisa.
Uyilo lwee-Multi-Focus Micro-Lenses
Ngokuvela kwethiyori ye-"defocus", abavelisi abakhulu belensi bavelise iintlobo ezahlukeneyo zelensi ze-defocus. Kwiminyaka emibini edlulileyo, iilensi ze-micro-lens defocus ezine-multi-focus nazo ziye zaqaliswa enye emva kwenye. Nangona zonke ziyilensi ze-defocus ezine-multi-focus, kukho umahluko omkhulu kuyilo kunye nenani leendawo zokugxila.
1. Ukuqonda ii-Micro-Lenses
Xa unxibe iiglasi zamehlo ezibona ngamehlo omnye, ukukhanya okuvela ngqo kumgama othile kunokuwela kwi-fovea, indawo ephakathi ye-retina. Nangona kunjalo, ukukhanya okuvela kumda, emva kokudlula kwilensi enye, akufikeleli kwinqanaba elifanayo le-retina. Ekubeni i-retina inegophe, imifanekiso evela kumda iwela emva kwe-retina. Ngeli xesha, ingqondo ikrelekrele kakhulu. Xa ifumana olu vuselelo, i-retina iya kuhamba ngokwemvelo iye kumfanekiso wento, ikhuthaze ukuba iliso likhule libuyele umva, nto leyo ebangela ukuba i-myopia iqhubeke nokukhula.
Kubalulekile ukuqaphela:
1. I-retina inomsebenzi wokukhula isiya kumfanekiso.
2. Ukuba umfanekiso we-cornea ephakathi uwela kwindawo ye-retina, ngelixa umfanekiso ongasecaleni uwela ngasemva kwe-retina, kuya kubangela ukungaboni kakuhle.
Umsebenzi wee-micro-lens kukusebenzisa umgaqo wokudibanisa ukukhanya ngelensi eyongeziweyo ejikeleze ummandla ukuze kutsalwe imifanekiso ejikeleze ummandla ngaphambili kwe-retina. Oku kuqinisekisa umbono ocacileyo phakathi ngelixa kuvumela imifanekiso ejikeleze ummandla ukuba iwele kwicala elingaphambili le-retina, nto leyo edala ukutsala kwi-retina ngeenjongo zokuthintela nokulawula.
Kubalulekile ukuqaphela:
1. Nokuba yilensi ye-peripheral defocus okanye ilensi encinci ene-multi-focus, zombini zitsala imifanekiso ye-peripheral ngaphambili kwe-retina ukuze zenze i-peripheral myopic defocus ngelixa zigcina umbono ocacileyo phakathi.
2. Isiphumo siyahluka ngokuxhomekeke kubungakanani bokucinywa kwemifanekiso engaphandle ewela ngaphambili kwe-retina.
2. Uyilo lweeLensi zeMicro-Concave
Kwimbonakalo yeelensi ze-micro-defocus ezigxile kakhulu, sinokubona amanqaku amaninzi e-micro-defocus, aqulunqwe ziilensi ezigobileyo ngazinye. Xa sijonga iinkqubo zoyilo lwangoku, iilensi ezigobileyo zingahlulwa zibe: iilensi ezigobileyo ezinamandla angalinganiyo, iilensi ezingengo-micro-defocus eziphantsi, kunye neelensi eziphezulu ezingezizo-micro-defocus (ngomahluko omkhulu kumandla phakathi kombindi nommandla).
1. Isiphumo somfanekiso weelensi ezingezizo ezo-micro-defocus eziphezulu ziyahlangabezana nolindelo, nto leyo ebonelela ngolawulo olungcono lwe-myopia.
2. Ukufiphala kwemifanekiso engajoliswanga: Iilensi eziphezulu ezingezizo ezijoliswanga kakhulu zenza imisebe yokukhanya engajoliswanga kwaye ihlukane. Ukuba isignali ephambi kwe-retina icacile kakhulu, inokukhethwa njengophawu olubonakalayo oluphambili lokubukela kufutshane, nto leyo ebangela ukuba imifanekiso elandelayo ingabonakali kude.
Iingenelo zokusebenzisa iilensi ezingezizo ezo-micro-defocus eziphezulu:
1. Ukudala ubunzima bokufota ingqondo ngokungayijolisi, abantwana abayi kugxila besebenzisa iilensi ezincinci, kodwa baya kuzikhethela ngokuzimela ukugxila kwiindawo ezicacileyo eziphakathi kwendawo ephakathi kunye nomda.
2. Ukudala i-myopic defocus enobubanzi nobukhulu, nto leyo ekhokelela ekubambeni okuqinileyo kunye nokusebenza ngcono kolawulo lwe-myopia.
3. Iingozi Zokujonga NgeeLensi Ezincinci Ezigobileyo
Eyona nto ixhalabisa kakhulu ngeelensi zokulawula i-myopia ezinee-micro-lens kukuba abantwana banokugxila kwizinto ezisebenzisa ii-micro-lens, ezinokuba nemiphumo emibi elandelayo:
1. Ukukhethwa kokubona kufutshane njengophawu oluphambili olubonakalayo
2. Umbono ofipheleyo wezinto
3. Ukunxiba ixesha elide okuchaphazela ukulungiswa
4. Okukhokelela kuhlengahlengiso olungaqhelekanga kunye nokuhambelana kokudibana
5. Ulawulo olungasebenziyo lwe-myopia xa ujonga izinto ezikufutshane
Ukuququmbela
Njengoko iilensi ze-micro-defocus ezijolise kakhulu zisanda, ukukhetha eyona ifanelekileyo kuba ngumceli mngeni. Nokuba le lensi injani na, injongo kukwenza umfanekiso ocacileyo kwi-retina ngelixa kugcinwa isignali ye-myopic defocus ezinzileyo nezinzileyo phambi kwe-retina ukuze kuncitshiswe isantya sokuqhubekeka kwe-myopia kunye nokwandiswa kwe-axial yeliso. Ubuchule, ubuchwepheshe, kunye nokuqinisekiswa komgangatho weelensi ze-micro-defocus ezijolise kakhulu zibalulekile. Iilensi ezikumgangatho ophantsi azisileli nje ekuncitshisweni kwesantya sokuqhubekeka kwe-myopia kunye nokwandiswa kwe-axial kodwa ukunxitywa ixesha elide kunokuchaphazela utshintsho, okukhokelela ekuhambelaneni okungaqhelekanga kokudibana.
Ixesha leposi: Juni-21-2024